Reuters –Rescue teams toiled in pouring rain on Thursday in the debris left by last week's devastating earthquake in Nepal, but officials said the chance of finding any more survivors was bleak as the death toll neared 5,500.

While rescue teams were out in the capital Kathmandu despite the rain, helicopters could not fly to the worst-hit areas in the countryside of the impoverished Himalayan nation.

"There may not be any more survivors," said Rameshwor Dandal, chief of the disaster management center at Nepal's home ministry."The rain is adding to the problems. Nature seems to be against us."

Many people have been sleeping in the open since Saturday's quake. According to the United Nations, 600,000 houses have been destroyed or damaged.

Eight million people have been affected, with at least two million in need of tents, water, food and medicines over the next three months.

An official from Nepal's home ministry said the number of confirmed deaths from the 7.8 magnitude earthquake had risen to 5,489 by Thursday morning, and almost 11,000 were injured. More than 80 people have been killed in neighboring India and Tibet.

Anger over the pace of the rescue has flared up in some areas, with Nepalis accusing the government of being too slow to distribute international aid that has flooded into the country.

It has yet to reach many in need, particularly in remote areas hard to access given the quake damage and weather conditions.Tensions between foreigners and Nepalis desperate to be evacuated have also surfaced. In Langtang valley, where 150 people are feared trapped, a helicopter pilot was taken hostage by locals demanding to be evacuated first, one report said.

Russell Brice, head of climbing company Himalayan Experience, said he had asked the government to send a military helicopter to fly into Langtang to rescue the stranded, including three of his Indonesian clients, because civilian helicopter teams were afraid to go there.

"EVERYTHING ON OUR OWN"

In Ashrang village in Gorkha, one of the worst-hit districts about four hours by road fromKathmandu, hundreds of Nepali villagers were living out in the open with little food and waterdespite boxes of biscuits, juices and sacks of rice and wheat being stored in a nearby government office.Police commandos shut the high iron gates of the building, refusing people access while they counted the relief supplies."We told them we can manage without their help," saidMohammad Ishaq, a school teacher, who had been offered four plastic sheets. "It is as if we are doing everything on our own, feeding our people, tending to the sick."

In Sangachowk village, another badly hit district, a stand-off on Wednesday between soldiers and angry local residents who blocked trucks carrying supplies to earthquake victims was resolved and the vehicles were allowed to pass.

The army promised villagers it would return with aid later.

Foreign rescue teams told government officials their work was nearly done because there was little chance of finding many more survivors.

A Nepali-French rescue team pulled a 28-year-old man, Rishi Khanal, from a collapsed apartment block in Kathmandu on Tuesday after he had spent around 80 hours trapped in a room with three dead bodies."I managed to take out the handkerchief from my pocket, soaked it with my urine and squeezed it in my mouth," Khanal told Reuters on Thursday, a day after he had one of his legs amputated. "It gave me some energy to shout and I survived."

But he wondered how he would live with his injury, which would prevent him seeking work in theMiddle East as a laborer or on a farm in Nepal.

"I don't even have the money to buy a wheelchair now. How will I spend the rest of my life and support my family?"

APPEAL FOR HELICOPTERS

Nepal is appealing to foreign governments for more helicopters. There are currently about 20 Nepali army, private and Indian army helicopters involved in rescue operations, according to Laxmi Prasad Dhakal, a home ministry official.

China is expected to send helicopters on Thursday, he said.Prime Minister Sushil Koirala told Reuters earlier this week the death toll could reach 10,000, with information on casualties and damage from far-flung villages and towns yet to come in.

That would surpass the 8,500 who died in a 1934 earthquake, the last disaster on this scale to hit the nation of 28 million people sandwiched between India and China.

In Kathmandu and other cities, hospitals quickly overflowed with injured soon after the quake, with many being treated out in the open or not at all.

"The new waves of patients are those who survived the quake, but are sick because they were living in the open and drinking contaminated water," said Binay Pandey, a doctor at the government-run Bir Hospital in the capital.Pandey said at least 1,200 patients suffering fromwater-borne illnesses had been admitted in the hospital since Wednesday morning.

Sporadic rains made it difficult for students and volunteers to clean the streets and dispose of garbage.

In the Himalayas, climbing is set to reopen on Mount Everest next week after damage caused by avalanches triggered by the quake is repaired.

A massive avalanche wiped out a swath of Everest base camp, killing 18 climbers and sherpa mountain guides and injuring more than 60 on Saturday. Many climbers have abandoned their ascent of Everest, the world's tallest peak at 29,035 feet.